Platform for supporting a ladder on stairs



FIG. 1 is a top plan view of a platform for supporting a ladder on stairs, showing my new design.

FIG. 2 is an elevational view of one side, the opposite side being a mirror image thereof.

FIG. 3 is a bottom plan view.

FIG. 4 is an end elevational view thereof, taken from the left of FIG. 2.

FIG. 5 is an end elevational view thereof, taken from the right of FIG. 2. 

The ornamental design for a platform for supporting a ladder on stairs, substantially as shown and described. 